POI Shift Between Ammo Types?

Status
Not open for further replies.
If your ammo is "similar velocity" AND Similar Quality $? Then #1 is loose scope, #2 is faulty scope, #3 is Stable Platform?, #4 is Trigger Nut.
Other possibilities may arise, too.
 
Buck1950 said:
...Other possibilities may arise, too.
Click to expand...

I think you're on the wrong track, Buck - Look at what he's posted: He thinks the POI shift between different ammunition types is larger than it should be, and expects that a different barrel will reduce the POI shift.
 
coleman1495 said:
...Not sure whats confusing folks here. I’m getting abnormally large POI shifts between ammo types. ...
Click to expand...

Nobody else here thinks that your POI shift with different ammo types is "abnormally large". If I were in your shoes, I would consider the possibility that I might be mistaken.
 
coleman1495 said:
Sounds like the barrel is the first place to look. I know what my next big ticket purchase will be.
Click to expand...

^hey coleman-not sure if this helps, but I'll take a crack at it!

The idea of testing ammo is to determine which ammo type shoots best. "Type" as in singular=1 ammo type. If you find more than one that your gun likes, consider it a win...but allot of guns (Even top shelf ones) may show a strong preference for one type over all others. Every additional ammo type that shoots well? Even better, but this is NOT tied to POI changes. In most cases, you find the one it likes (as others have said), zero your scope for that, buy lots of it and move on.

I get your thread starter, you're wondering why if zeroed for Mini Mags (for example) and you put a different ammo type in and they land 3" away? Totally normal, and could be due to a bunch of reasons. It's NOT a sign of a bad barrel either. What you're experiencing is more the NORM than the exception. If it colors the conversation in any helpful way, in my experience..the better the barrel, the more it IS likely to have a SMALL number of ammo types it likes...not the other way around.

The outcome most rimfire shooters are after is to find ONE ammo type the gun really likes/shoots well. If your CZ has achieved that (and nothing Aguila has ever shot accurately for me so far btw) you're good to go! Reminder that subsonic ammo types are inherently more accurate/consistent, so look for consistencies/inconsistencies in ammos based on that criteria. If you zero for those Mini Mags (high velocity) then wonder why CCI Standard Velocity (subsonic) has a notably different POI, you don't need to really wonder. If you hope to only see elevation drops with different ammo types, you might be disappointed there too. Would make sense if different velocities only impacted elevation....but they can land to the left/right too. If technique doesn't explain it away and everything is anchored down/the scope is gtg, trust the feedback your gun is giving you. Most people do that, whether it's the type of ammo they hoped would work or not.

Hope this helps?
 
alpining said:
Nobody else here thinks that your POI shift with different ammo types is "abnormally large". If I were in your shoes, I would consider the possibility that I might be mistaken.
Click to expand...

I’d have to disagree. As I’ve stated multiple times, POI shift is expected. This particular rifle has a lot of shift, way more than I’ve seen. Maybe it’s acceptable to other people but I’d rather not have a rifle that has that much shift. To be honest, 3” shift might be on the conservative side. Either way the shift is unacceptable in my opinion and not practical for the rifles intended purpose.
The tight bore theory might explain why the shift is exaggerated.
 
coleman1495 said:
I’d have to disagree. As I’ve stated multiple times, POI shift is expected. This particular rifle has a lot of shift, way more than I’ve seen. Maybe it’s acceptable to other people but I’d rather not have a rifle that has that much shift. To be honest, 3” shift might be on the conservative side. Either way the shift is unacceptable in my opinion and not practical for the rifles intended purpose.
The tight bore theory might explain why the shift is exaggerated.
Click to expand...

Did you bother checking if the stock is loose, if your scope is broken? But the fact you have not answered it makes us believe you just want us to agreed so you can justify buying a new barrel.

That's like saying I have a vibration in my car, must got a broken belt in my tire. When your lug nuts are loose.
 
The big question here is why does it matter. Why not stick with one type of ammo if it shoots good groups with multiple? Rezeroing after an ammo change shouldn’t be a big issue.
 
OkayShooter said:
Did you bother checking if the stock is loose, if your scope is broken? But the fact you have not answered it makes us believe you just want us to agreed so you can justify buying a new barrel.

That's like saying I have a vibration in my car, must got a broken belt in my tire. When your lug nuts are loose.
Click to expand...

Yes I’ve checked all that-not my first rodeo. Also as I stated, the accuracy is fine just the shift in POI is the issue.
 
1ShotKing said:
The big question here is why does it matter. Why not stick with one type of ammo if it shoots good groups with multiple? Rezeroing after an ammo change shouldn’t be a big issue.
Click to expand...

Its just an annoyance. For instance if I am shooting offhand and switch ammo brands/types, my POI shifts more than a beer can away. I have to sight it in for each ammo type. 6 other 22lr rifle’s don’t have half as much shift.
 
coleman1495 said:
Its just an annoyance. For instance if I am shooting offhand and switch ammo brands/types, my POI shifts more than a beer can away. I have to sight it in for each ammo type. 6 other 22lr rifle’s don’t have half as much shift.
Click to expand...

Hey Coleman-I get it, but you might be frustrated with something that is totally normal, and not just with rimfires. With centerfire, you can load and try to correct for small deviations with different powders/charges, bullet weight/type, primers, seating depth, etc.

Rimfire=the gun likes it or it doesn't.

Not that my own experience matters much, but I've been shooting 22LR pretty enthusiastically for over 3 decades, and in all that time...and with all the guns that have come and gone, what you're describing has been exactly what I've seen with every gun except 1. What you're experiencing really IS the norm, and likely not a barrel issue at all. I think you might have gone into this with unrealistic expectations to be honest. Not meant to be a smarmy remark, but rimfire ammo is like any other factory ammo in any caliber..only you don't have the luxury of rolling your own to try and change a result down range. If you have even found one type your rifle likes, I'd suggest you go with it and enjoy. Any other expectation of the rifle doesn't seem realistic.

On a related note I guess, whenever a new ammo type comes out I always read reviews and see what kind of results people are getting and with what rifle. For SURE...if I see a gun I like shooting well with an ammo I haven't tried, that ammo goes to the top of the shopping list to try. I may get a better result than what I'm getting...or I may not. But I can't change the gun's preference.
 
I often see 1" poi shift between brands of 22 rimfire at 50 yards. I also see a shift from a cold bore, and transition in shift as I switch ammo types. It takes a few shots to drift back to the same poi after using a different type of ammo. My guess is that it has to do with conditioning of the bore. Different lubes and dry ammo with copper plating.
 
.22LRGUY said:
Hey Coleman-I get it, but you might be frustrated with something that is totally normal, and not just with rimfires. With centerfire, you can load and try to correct for small deviations with different powders/charges, bullet weight/type, primers, seating depth, etc.

Rimfire=the gun likes it or it doesn't.

Not that my own experience matters much, but I've been shooting 22LR pretty enthusiastically for over 3 decades, and in all that time...and with all the guns that have come and gone, what you're describing has been exactly what I've seen with every gun except 1. What you're experiencing really IS the norm, and likely not a barrel issue at all. I think you might have gone into this with unrealistic expectations to be honest. Not meant to be a smarmy remark, but rimfire ammo is like any other factory ammo in any caliber..only you don't have the luxury of rolling your own to try and change a result down range. If you have even found one type your rifle likes, I'd suggest you go with it and enjoy. Any other expectation of the rifle doesn't seem realistic.

On a related note I guess, whenever a new ammo type comes out I always read reviews and see what kind of results people are getting and with what rifle. For SURE...if I see a gun I like shooting well with an ammo I haven't tried, that ammo goes to the top of the shopping list to try. I may get a better result than what I'm getting...or I may not. But I can't change the gun's preference.
Click to expand...

I totally get what your saying, I just think that I’m seeing a bigger shift in POI than I should be.
This rifle seems to shoot everything okay, just the massive shift in POI is annoying.

Yes I could stick to one type of ammo but its not practical in my circumstances. I’d like to see a typical shift in POI and was wondering what the first thing to check was.
 
Grizzlypeg said:
I often see 1" poi shift between brands of 22 rimfire at 50 yards. I also see a shift from a cold bore, and transition in shift as I switch ammo types. It takes a few shots to drift back to the same poi after using a different type of ammo. My guess is that it has to do with conditioning of the bore. Different lubes and dry ammo with copper plating.
Click to expand...

That’s exactly what I’m used to seeing.
Only good thing is that if you want to prank your buddy, just switch ammo on him. He’ll be wondering why his shots are way out.
 
You can think whatever you like, it doesn't change the fact 3" is not incredible. If your other guns usually only shift 1-1.5" then that's great, your CZ still isn't broken.
 
Status
Not open for further replies.
Back
Top Bottom